APA (7th ed.) Citation

Spearing, D., & Sheldon, R. A. (1991). Roadside geology of Texas. Mountain Press.

Chicago Style (17th ed.) Citation

Spearing, Darwin, and Robert A. Sheldon. Roadside Geology of Texas. Missoula, Mont.: Mountain Press, 1991.

MLA (9th ed.) Citation

Spearing, Darwin, and Robert A. Sheldon. Roadside Geology of Texas. Mountain Press, 1991.